Brenner Base Tunnel: TBM Virginia Has Reached the Brenner
After 4 years, the first tunnel boring machine (TBM) of a main tunnel in the Brenner Base Tunnel successfully completed driving on 30 March 2023. TBM Virginia covered around 14 km on its journey, installing over 56 800 segments in the eastern main tunnel.
Since May 2019, the over 200-metre-long TBM had been working its way from the assembly cavern towards the Brenner Pass. By reaching its destination, part of the first main tunnel tube has been completed, in which trains will travel in the future.
The highlight was a live broadcast for the participants, who were able to watch the installation of the last concrete segment. For the occasion, the TBM operators had dyed the last segment with the Austrian and Italian national colours.
Jubilation among the miners and project representatives: TBM "Virginia" reached the Brenner on 30 March 2023
Credit/Quelle: BBT SE
For the members of the Board of Directors of BBT SE, Gilberto Cardola and Martin Gradnitzer, the arrival of one of the TBMs at the Brenner Pass represents an important day for the entire project. “With the completion of the first excavation of the eastern main tunnel in Italy, the Brenner Base Tunnel achieves a fundamental goal. Special recognition goes, above all, to the TBM operators. The mechanised excavation within this section was carried out safely and the team did their utmost every day to ensure that the TBM would be able to reach the state border today. Our thanks also go to the planners, engineers, geologists and all employees of BBT SE who contributed significantly to this achievement.”
Project Progress
The Brenner Base Tunnel is a railway tunnel with a flat alignment connecting Austria and Italy and is regarded as the centrepiece of the new Munich-Verona railway link. It runs between Innsbruck (Austria) and Franzensfeste (Italy) over a length of 55 km.
The Brenner Base Tunnel is a tunnel system that extends over a total length of 230 km. To date, 157 km of tunnel have been driven: 60 km of main tunnels, 55 km of exploratory tunnels and 42 km of other tunnels.
The TBM’s Best Performances
The “H61 Mules 2–3” construction lot is the largest lot of the entire Brenner Base Tunnel project and comprises a tunnel system of approximately 65 km. During its journey within this lot, which started on 22 May, 2019, the Virginia TBM (total weight: 2750 t, engine power: 4200 kW) excavated a daily average of 10.2 m, with a maximum of 40.5 m in one day on 16 February, 2020. The record that set Virginia apart from all other machines of comparable cutterhead diameter (10.71 m), was set in March 2021. In one month, Virginia excavated an impressive 859.50 m
